A pink mare with a light blue mane wakes up in a dark and unfamiliar room, unable to remember anything. As far as she can tell, she is alone.
Soon however, a strange blue-ish gray pony with green, prehensile hair shows up, claiming to be the dark side of the pink mare.
Nicely done. The tone was very eerie, and the overall story was well served by the stilted writing style. Not something a lot of people can pull off.